
Thank you for purchasing UNI-T product. To operate the instrument correctly, please
read this Operating Manual carefully and especially its “Safety Notice” before use
Afer reading it, you are suggested to keep the manual properly. Please keep it with the
instrument together or place it in an accessible location for future use

General Safety Overview
The instrument is designed and manufactured strictl
according to “Safety Requirements of Electronic
Measuring Instruments” (GB4793) and IEC61010-1
Safety Standard . It conforms to “Insulation Overvoltage
Standard” (CAT 600V) and Safety Standard wit
Pollution Level You are expected to know the followin
safety precaution measures to avoid personal injury or
product damage or any other product connected to it
Please use the product according to the regulations so
as to avoid the possible damage
Only personnel with professional training can execute
maintenance procedure to avoid fire or personal
injury. Appropriate power wires should be used and
special power wires must be approved by the state
Reliable grounding of products: The product is
grounded by ground conductor of power supply
Ground conductor must be connected to earth to
avoid electric shock. Please guarantee correct
grounding before connecting input/output terminal of
Correct connection of oscillograph probe: Earth wire
of probe is the same to earth potential. Ple ase do not
connect earth wire to high volt age
Review of rated values of all terminals: Please refer to
all rated values and marks on the product surface to
avoid fire or excessive current shock. Please refer to
product manual before connecting products so as to
know details of rated value s.D o not open cover plate
of machine box: It is not allowed to start or operate the
product when opening external cover or panel
Ċ
Ċ
Correct plug-in/out: Please do not plug in/out whe
connecting probe or testing conduits to voltage
source
Operating Manual for UTD2000/3000

Operating Manual for UTD2000/3000
Usage of appropriate fuse: It is only allowed to use
fuse type and rated indicator designated by the
product
To avoid exposed circuits: It is not allowed to touc
exposed connector or element after power supply
Operation is not allowed if there is any doubt for
product trouble: Please consult qualified maintenance
personnel to inspect the product if there is any trouble
doubt
It has to maintain appropriate ventilation. It is not
allowed to operate in wet locations. It is not allowed
to operate in combustible and explosive
environment. It has to keep product surface clea

Terms in the manual: The following terms may be
seen in the manual
Terms for products: The following terms may be
Danger: It refers to direct injury near the mark
Warning: It refers to potential injury near the mark
Note: It refers to potential danger for the product
and other properties
Warning: Warning s tatement means the
conditions and behaviors that may endanger lives.
Note: Notice statement means the conditions
and behaviors that may cause other property
damage
Protective
ground terminal
Ground terminal
for chassis
Ground terminal
for testin
Refer to manual
High voltage
Safety Ter ms and Symbols
Product symbol: Following symbols may be show
Operating Manual for UTD2000/3000

Operating Manual for UTD2000/3000
The manual is about operation information of OPERATING MANUAL FOR UTD2000/3000 digital storage
oscillograph. The manual includes the following chapters
Chapter 1: User Guideline: It is to introduce functions of digital storage oscillograph easily and provide
installation guidelines
Chapter 2: Instrument Setup:Operation methods of OPERATING MANUAL FOR UTD2000/3000 digital
storage oscillograph
Chapter 3: Application example: Examples to solve various measurement problems
Chapter 4: System Prompt and Troubleshootin
Chapter 5: Appendix: Technical Indicators
ppendix B: Fittings of OPERATING MANUAL FOR UTD2000/3000 series digital storage oscillograph
ppendix C: Maintenance and Cleaning Maintenance
Preface

The manual includes 3 series of digital storage oscillograph as follows. Detailed models are shown in the
following form
Operating Manual for UTD2000/3000
UTD2 C/UTD3025
UTD2202CE/UTD3202CE
UTD2025C
250MS/s
500MS/s
500MS/s
500MS/s
500MS/s
500MS/s
500MS/s
1GS/s
1GS/s
1GS/s
1GS/s
1GS/s
1GS/s
1GS/s
1GS/s
250MS/s
500MS/s
UTD2000C/3000
Series Model
Band width
Real-time

Operatin g Manual for UTD2000/3000
UTD2000/3000 series digital storage oscillograp
provides simple front panel with clear functions to
users for all basic operations. Scale and position of
various channels can provide intuitional operatio
to meet usage habits of traditional instruments
Users can use it skillfully without learning and
being familiar with operation for a long time. Users
can also press AUTO key directly to accelerate
adjustment and facilitate measurement
ppropriate waveform and gear setup can be
shown on the instrument panel
UTD2000/3000 series digital storage oscillograp
also has high-performance indicators and powerful
functions to fulfill measurement tasks quickl
besides easy usage. Quicker signals can be
observed by UTD2000/3000 series digital storage
oscillograph by real-time sampling of 500MS/s (or
1GS/s) and equivalent sampling of 25GS/s (or
50GS/s). It can capture and analyze waveform
easily by powerful trigger and analysis capacity
Users can also observe and analyze signal
problems quickly and clearly by clear LCD displa
and mathematical calculation function. We can see
that such series of digital storage oscillograph ca
meet your measurement requirements by following
performance characteristics
High-resolution colorful LCD display system wit
resolution of 320 240 or 800 480
To support plug and play USB storage instrument
to communicate with computer
utomatic waveform and status setup
Waveform, setup, bitmap storage, waveform and
setup reoccurrence
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Elaborate view window extension function for
delicate analysis of w aveform details and profile
utomatic measurement of 28 kinds of
waveform parameters
utomatic cursor tracing and measurement
functio
Unique waveform recording and playback
functions
Embedded FFT
Multiple mathematical calculation functions
(including +, -, for waveform
Edge, video, pulse width and ALT TRIG
functions
Multi-language menu displa
Fittings of UTD2000/3000 series digital storage
oscillograp
2 probes of 1.2m 1:1/10:1 please refer to
manual of probe Fittings of probe details so as
to meet EN61010-031:2008 standar
1 power wire to meet national standards
1 Operating Manual
1 Product Warrant
USB connecting wire: UT-D06 or UT-D0
Communication control software for
UTD2000/3000 series oscillograp
㧦
Operating Manual for UTD2000/3000

Item
Elementary understanding of Trigger System..........................................
Page
..........................................................................................
.........................................................................................
......................................................................................
............................................................
Elementary understanding of Vertical System...............................................
Elementary understanding of Horizontal System..........................................
General Safet y Overvi ew
Preface
Setup of Vertical System........................................................................
Setup of Horizontal System.....................................................................
Setup of Trigger System..........................................................................
utomaticSetup of Waveform Displa
Chapter 1: User Guideline ..................................................................................
31
Operatin g Manual for UTD2000/3000
Content
Chapter 2: Instr ument Setup.......................................................................
1

Page
...................................................................................
..........................................................................................
Setup of Auxiliary Functions .............................................................................
utomatic Measurement...................................................................................
Cursor Measurement ........................................................................................
....................................................................................................
....................................................
..................................................................
Setup of Display System
Storage and Callout
Operation Ke
Chapter 3: Application Examples
Example 1: Measurement of Simple Signals
Example 2: Delay Obser vati on of Sin e Sig na l s by Circ ui t.. ... .... ... ... ... ... .... ... .
Example 3: Capture of Sing le S igna l .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ... .... .
Example 4: Reduction of Ran do m Noi se for S igna ls. ... ....................... ... ... ....
Example 5: A p plic a tion Cu r sor Me asu r em en t.. ... .... ... ... ... .... ... ... ... .... ... ... ... ...
Example 6: Application of X-Y Functio
Example 7: Trigger of Video Signals
................. ... .... ... ... ... .... ... ... ....... ... ...
.................. ... .... ... ... ... ... .... ... ...
8505560687072727375767879
Operating Manual for UTD2000/3000
Item
Setup of Sampling System................................................................

Item Page
.......................................................
............................................................................
.....................................................
...............................................................................................
.........................................
Examp
Examp : Usage of Upgrading Procedure of U disk
System Prompt Informatio
ppendix A: Technical Indicators......................................................
ppendix B: Fittings of UTD2000/3000 Series Digital Storage Oscillograph..
ppendix C: Maintenan ce and Clea ning Mai nte nan ce... ..... .... .... .... ..... .. ....
Example 10: Usage of Storage Functio
Chapter 4: S ystem Prompt and Troubleshooting
Chapter 5: Technical Indicators............................................................
Example 8: Pass/Fail Detectio
Operating Manual for UTD2000/3000

Operating Manual for UTD2000/3000
Chapter 1: User Guideline
Ƹ
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Function inspectio
Elementary understanding of vertical system
Elementary understanding of horizontal system
UTD2000/3000 series digital storage oscillograph is
a small and handy desktop product. Basic test can be
done by providing convenient front panel to facilitate
operation for users
UTD2000/3000 series are to provide simple front
panel with clear functions to users for basic
operation. Panel also includes knob and function key
Knob functions are similar to those of other digital
storage oscillograph
The chapter is to show execution of following steps
General inspectio
5 keys in a row in the right side of display panel are
menu operation keys. (They are defined as F1 to F
keys from top to bottom.) You can also set different
options for current menu by them. Other keys are
function keys. You can enter into different functio
menus or gain specific function application directly
㧦
Elementary understanding of trigger system
Please know front operation panel firstly after
getting UTD2000/3000 series digital storage
oscillograph. The chapter is to introduce operation
and functions of front panel for
UTD2000/3000products so as to be familiar wit
usage within the shortest period
utomatic setup of waveform displa

Operating Manual for UTD2000/3000
2
5.7 inch front panel of UNI-T
probe compensatio
signal output
vertical control
horizontal control
Operatio
controls
multi-purpose
knob controller
commo
trigger control
EXT TRIG INPUT
analog signal input
interface

Operating Man ual for UT D2000/30 00
3
probe compensatio
signal output
vertical control
horizontal control
Operatio
controls
multi-purpose
knob controller
commo
trigger control
EXT TRIG INPUT
interface
7 inch front panel of UNI-T

Operatin g Manual for UTD2000/3000
4
display of horizontal trigger positio
time display of central scale line
vertical scale
coefficient of
display channel
display setup of
main time base
waveform
display window
Menu varies wit
display of trigger status
mark of
channel 1
Interface display diagram of digital storage oscillograph (i.e. UTD2000L series

Operating Manual for UTD2000/3000
5
General inspectio
It is suggested to inspect the instrument b
following steps when getting a new UTD2000/3000
series digital storage oscillograph
1. To check if there is damage due to transportatio
Please replace carton or foaming plastic protectio
cushion with severe damage instantly
2. Please inspect fitting details and shown it i
“Fittings of UTD2000/3000 series digital Storage
Oscillograph” shown in the manual. You can check
if there are deficient fittings or not by referring to it
Please contact UNI-T distributor or local agent if
there are deficient or damaged fittings
3. Please inspect the entire machine and contact UNI-T
distributor or local agent for damaged appearance
abnormal operation or failing to pass performance test
Please pay attention to packages and report to
transportation department and UNI-T distributor if
machine damage is caused by transportation
1. Connect the power suppl
You can supply power to the machine and voltage is A
100V to AC 240V. Frequency is 45Hz to 440Hz. It has
to press [UTILITY] menu and [F1] for self-correctio
after power supply 30 minutes after operation of hot
machine so that digital storage oscillograph operates
under the
best status. As shown in Figure 1 4, please
enter into next page and press [F1] to call out ex-factor
㧙
UNI-T will arrange maintenance or replacement
Please carry out once fast function inspection to
check if the machine operates normally or not
Please operate according to following steps

Warning: Please confirm safety grounding of digital
storage oscillograph to avoid dangers
2. Signal access of digital storage oscillograph is
double-channel input for UTD2000/3000 series
digital storage oscillograph. There is also 1 EXT
TRIG INPUT channel. Please connect signals
according to following steps
(As shown in Figure 1-5), connect probe of
digital storage oscillograph to CH1 input terminal
and set attenuation ratio switch on probe to 10×
Figure 1 5 Setup of attenuation ratio switch o
Operating Manual for UTD2000/3000
6
Figure 1-
CQUIRE STORAGE
UTILITY
MULTIPURPOSE
SELECT
POSITION
SCALE SCALE
VOLTS DIV
VVm
POSITION
SECD IV
SS
LEVEL
MATH
FORCE
HELP
MENU
TRI
CH2
SET
Operating Man ual for UT D2000/30 00

Operating Man ual for UT D2000/30 00
7
ĸIn digital storage oscilloscope to set the probe
attenuation factor. The attenuation coefficient of
vertical gear ratio change instruments, whic
makes measurement resultsSetup method of
attenuation coefficient of pr obe is as follows to
show amplitude of measured s ignals correctly
Please press
Figure 1-6 Setup of deflection coefficient of probe
on digital storage oscillograp
F4 key for menu display of 10
Connect probe and grounding clip to
corresponding connection ends then press [AUTO]
button. As shown in Figure 1-7, square wave (1kHz
about 3V and peak value) can be displayed withi
several seconds. It has to inspect CH2 by the same
method then press [OFF] function button so as to
power off CH1. It has to press [CH2] function butto
to power on CH2 and repeat the second and third

Operating Manual for UTD2000/3000
Probe compensatio
It needs to adjust it when connecting probe to an
input channel for the first time so that probe can be
appropriate to input channel. Probe without
compensation correction can also bring i
measurement tolerance or error. Please operate
according to following steps for adjustment of
probe compensation
1. To set probe menu attenuation coefficient to
10× and place probe switch to 10× then connect
digital storage oscillograph probe to CH1. Please
guarantee reliable contact to probe. It has to
connect probe end to signal output connector2of
probe compensator then connect grounding clip to
earth wire connector of probe compensator. It also
has to power on CH1 and press [AUTO]
3. Adjust variable capacitance on the probe b
screwdriver of non-metallic handle for waveform
display of “insufficient compensation” or
“excessive compensation” shown in above figure
until “correct compensation” for waveform displa
Warning: Please guarantee perfect insulatio
conduits of probe and do not contact metallic part
of probe when connecting to HV source to avoid
electric shock of probe during HV measurement
Observation of displayed waveform
8
Exceedin
Insufficient
compensation Figure 1
㧙
Compensation correction of probe

Operatin g Manual for UTD2000/3000
9
Automatic setup of waveform displa
UTD2000/3000 series digital storage oscillograp
has automatic setup functions. It can adjust vertical
deflection coefficient, scanning time base and
trigger mode automatically according to input
signal for the most appropriate waveform display
Frequency of measured signals shall be more tha
or equal to 50Hz and duty cycle shall exceed 1%
according to automatic setup requirements
1. Connect measured signals to signal input
channel
2. Press [AUTO] button so that digital storage
oscillograph can set ver tical deflection coefficient
scanning time base and trigger mode
automatically. They can be adjusted again after
careful observation and automatic setup so that
waveform display can realize the best effect
s shown in the following figure, there are a series
of keys and knobs in vertical control a rea. Please
introduce usage of vertical setup gradually as
follows
Automatic setup
Elementary understanding of vertical system
㧦
5.7-inch vertical
control panel of scree
7-inch vertical control
panel of scree
Figure 1 9 Vertical control area on the panel㧙

Operating Manual for UTD2000/3000
10
1. Use vertical position knob so that middle displa
of waveform signal in the window. Vertical displa
position of signal can be controlled by vertical
position knob
Ground mark moves vertically with waveform whe
rotating vertical position knob
Measurement knack
You can observe difference between waveform
and signal ground to measure DC component
of signal quickly if adopting DC channel
coupling mode. DC components in the signal
will be filtered if adopting AC coupling mode
. You can also display AC component of signal
by higher sensitivity conveniently
Vertical position of double analog channels shall be
restored to short-cut key of zero pointnamely
The key is to return vertical displacement/horizontal
displacement/hold off position to zero point
(or middle point)
Of w hich: UTD2000L /2000EX se ries will trigger
electric level Return to 50% of position
2 Alter vertical setup and observe alternation of
status information. You can determine variation of an
vertical gear by s tatus bar below waveform window
Vertical gear of “volt/grid” can be altered by rotatin
vertical scale knob to show corresponding variation for
channel gear display which corresponds to status bar
User can press [CH1], [CH2] , [MATH] and [REF] to
display operation menu, mark, and waveform and
gear status information of corresponding channels

Operating Manual for UTD2000/3000
1
Users can also press [OFF] key to c lose currentl
selected channels for UTD2000C/3000C and
UTD2000E/3000E oscillograph. They can also
click on CH1, CH2 and MATH keys twice to close
corresponding channels for UTD2000L/2000EX
oscillograph
s shown in following figure, there is 1 key and
knobs in horizontal control area. Please be familiar
with setup of horizontal time base gradually as
follows
Elementary understanding of horizontal system
Horizontal cont rol
panel of 5.7-inc
Horizontal cont rol
panel of 7-inc
Figure 1 10 Horizontal control area on the panel㧙

Operating Manual for UTD2000/3000
1. Use horizontal SCALE knob to alter horizontal
time base gear then observe alternation of status
information. To rotate horizontal SCALE knob to
alter “s/div” time base gear so as to show
corresponding variation of time base gear displa
for corresponding channels of status bar
Horizontal scanning speed steps from 2ns/di
Note: Horizontal scanning time base gear varies
for UTD2000/3000 series digital storage
oscillograph due to different models
2. Use horizontal POSITION knob to adjust
horizontal position of signals in waveform window
To use horizontal POSITION knob to control trigger
displacement of signals. Horizontal movement of
waveform with knob can be observed when rotatin
horizontal POSITION knob for application for
trigger displacement
3. Please press [MENU] button for 5.7-inc
oscillograph (and press [HORI MENU] button for 7inch oscillograph) to display Zoom menu. Please
press [F3] to open view window extension under
this menu then press [F1] to close view window
extension and return to main time base. Hold off
time can be set under this menu

Operating Manual for UTD2000/3000
1
Trigger point can be r estored to vertical m iddle
point quickly by short-cut key of [SET TO ZERO] so
as to restoring displacement of trigger point to
horizontal zero point short-cut key. Users can also
adjust horizontal position of signal in waveform
window by rotating horizontal knob
Trigger point: It refers to posi tion of actual trigger
point by comparing with middle point of storage
instrument. Users can move trigger horizontally b
rotating horizontal POSITION knob
Hold off: It refers to interval to start up trigger
circuit a gain
Hold off time can be set by rotatingmulti-purpose
knob controller
s shown in Figure 1 there is 1 knob and
(or 2) keys in control area of trigger menu. Pleas e
be familiar with setup of trigger system gradually as
follows
Elementary understanding of trigger system
㧙11
5.7-inch screen 7-inch scree
Figure 1 Trigger menu on the panel㧙11

1. To user trigger level knob to alter trigger level
and instruct trigger level line by seeing trigger mark
on the screen so that it moves vertical ly with knob
rotation. Variation of tr igger level in lower part of
screen can be observed when moving trigger level
at the same time
2. (As shown in Figure 1-12,) TRIGGER MENU ca
be used to alter trigger setup
User can press [F1] key to select “edge” trigger
n trigger signal amplitude
i
4.To press FORCE button: To produce 1 trigger
signal forcefully for mainly application for normal
and single trigger mode
Operating Manual for UTD2000/3000
14
They can press [F2]key to select “trigger source
They can press [F3] key to set “gradient” of edge
type to ascending
They can press [F4 ]key to set “trigger mode” to
automatic. They can also press F5 key to set
“trigger coupling” to AC
They can press [50%] button for 5.7-inch oscillograp
and press [SET TO ZERO] key for 7-inch oscill ograph
It also has to set vertical middle point of trigger level
2

Operating Manual for UTD2000/3000
1
Chapter 2: Instrument Setup
By now, you have been familiar with operation of
vertical control area, horizontal control area and
trigger system menu for UTD2000/3000 series digital
storage oscillograph preliminarily. You should be
familiar with setup of digital storage oscillograph b
menu operation by introduction shown in previous
chapter. It is suggested to read Chapter 1 if you have
not been familiar with above operation and methods
The chapter is mainly to introduce following themes
Set trigger systems of [TRIGGER LEVEL]
[MENU], ]50%] and] FORCE]
Set sampling mode of [ACQUIRE]
It is suggested to read the chapter carefully to know
many measurement functions for UTD2000/3000
and system operation method
㧦
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Ƶ
Ƶ
Ƶ
Ƶ Set vertical systems of [CH1], ]CH2],] MATH]
]REF] , ]OFF] ]VERTICAL POSITION] and
]VERTICAL SCALE]
Set horizontal systems of ]MENU] or ]HO
MENU], ]HORIZONTAL POSITION] or
[HORIZONTAL SCALE]
Set display mode of [DISPLAY]
Store and call-out for [STORAGE]
Set auxiliary system of [UTILITY]
utomatic measurement of [MEASURE]
Cursor measurement of [CURSOR]
Use execution buttons of [AUTO] and
[RUN/STOP]

Operating Manual for UTD2000/3000
Setup of vertical system
CH1 and CH2 channels and setup
Every channel has its own vertical menu. Ever
item can be set individually acc ording to different
channels. As shown in Form 2-1, the system ca
display operation menu of CH1 or CH2 channel b
pressing CH1 or CH2 function key
To obstruct DC component
of input signal
To cut off input signals by A
and DC components of input
signals
OFF
To limit band width to 20MH
so as to reduce display noise.
To set vertical deflectio
coefficient for coarse tunin
by 1-2-5 system. To refine
within setup scope of coarse
tuningforfinetuningsoasto
improve vertical resolution
To select one value according
coefficient to keep correct
vertical deflection coefficient
There are totally 4 kinds
OFF
To realize reverse directio
To display waveform normally.

1
Measured signal is a sine signal with DC component
by taking exerting signal to CH1 channel as a
To press F1 to select AC and AC coupling mode. D
component contained by measured signal will be
obstructed. Waveform display is shown in followin
Press F1 to DC to pass through DC and A
components of measured signals of CH1 channel
Waveform display is also shown in following figure
Figure 2 2 S ynchronous dis play o f DC and A
components of signal
Press F1 to select grounding and set channels to
grounding mode. DC and AC components
contained by measured signals will be obstructed.
Waveform display is shown in following figure
Setup of channel coupling㧦
Operatin g Manual for UTD2000/3000
Figure 2 Jammed DC component of signal㧙1
Setup of

Operating Manual for UTD2000/3000
(Note: Input signal still shall be connected to
channel circuit under such mode althoug
waveform is not
Figure 2 3 Synchronous obstruction of DC and
C components of signal
㧙
18
Ground couplin
Setup of cha nnel bandwidth limit㧦
Input one sine signal of about 40MHz for CH1 as an
example. It has to press [CH1] to open CH1 channel
then press [F2] to set bandwidth limit to OFF
Channel band width is full band width to pass
through high-frequency components contained by
measured signal. Waveform display is also shown
Figure 2 Waveform display when closin
bandwidth limit
㧙4
Bandwidt
Bandwidth suppression icon

Operating Man ual for UT D2000/30 00
1
Please press [F2] to set band width limitation to ON
for great attenuation of high-frequency component
and noise of more than 20MHz contained b
measured signals. Waveform display is also show
Figure 2 5Waveform display when openin
bandwidth limit
It has to set probe attenuation coefficient i
operation menu of channel to coordinate wit
attenuation coefficient setup of probe. Probe
coefficient in channel menu shall be set to 10× if
probe attenuation coefficient is 10:1. It has to
analogize to guarantee correct voltage
Volt/grid gears of vertical deflection coefficient can
be divided into coarse tuning and fine tuning
Please refer to following figure for setup and
vertical gear when using 10:1 probe
㧙
㧦3. Setup of multiplying factor for probe
Close
bandwidt
Figure 2 Probe attenuation coefficient shown

Operating Manual for UTD2000/3000
4.
2
Regulation setup of vertical volt/grid Setup of reverse phase of waveform
Reverse phase of waveform:
㧦
㨪
㨪
㧙㧙
Volt/grid scope is 2mV/di
V/div (or 10V/div), or 1mV/div V/div with step
by way of 1 Deflection coefficient shall be
altered within current vertical gear scope by less
step during fine tuning so as to realize
uninterrupted and continuous adjustment of vertical
deflection coefficient within all vertical gears
5
20
Setup of
fine tunin
Figure 2 Coarse tuning and fine tuning of
vertical deflection coefficient
㧙7
It is to show overturning degree of phase location of
displayed signals. Please refer to Figure 2 for
waveform without reverse phase. Please refer to
Figure 2 for waveform with reverse phase
Without
reverse phase
Figure 2 Setup of reverse phase of vertical
channel (or without reverse phase

Operating Manual for UTD2000/3000
2
Figure 2 9 Setup of reverse phase of vertical
channel
㧙
I. Realization of mathematical calculation
functio
Mathematical calculation functions are to show +, -
, / as well as FFT calculation results for CH1 and
CH2 channel waveform. Menu is shown as follows:
h
Reverse phase
of waveform
Figure 2 Mathematical calculatio

Operatin g Manual for UTD2000/3000
Analysis of FFT frequency spectrum
Time domain signal can be converted to frequency
domain signal when using mathematical calculatio
of fast Fourier transtable (FFT). Following types of
signals can be observed conveniently by usin
FFT
Measure harmonic content and distortion withi
㧦
Ɣ
ƔƔShow noise characteristics in DC power
Function Menu
Setup Descriptio
To set information source 1
as Ch1 channel waveform
To set information source 1
as Ch2 channel waveform
,
.
Information source 1
Information source
Information source 1
Information source
Information source 1
Information source
Information source 1
Information source
,
.
Ø
r
Operator
Informatio
To set information source
To set information source
Form 2-2: Introduction to mathematical calculatio

Form 2-3: FFT menu Descriptio
FFT operation knack:
Signals with DC component or deviation will brin
in error or deviation of FFT waveform component
C coupling mode can be selected to reduce D
verage obtainment mode of digital storage
oscillograph can be set to reduce random noise
and aliasing frequency component of repeated or
single pulse event
Operating Manual for UTD2000/3000
2
FFT
FFT mathematical
calculation
Informatio
To set CH1 and CH2 as
calculation waveform
Rectangle
Set Hanning window
functio
Set Hamming window
functio
Set Blackman window
functio
Set Rectangle window
functio
Vertical unit
Vrm s
dBVrm
To set vertical unit to
Vrms or dBVrms

Operating Manual for UTD2000/3000
Selection of FFT window
Mathematical storage oscillograph will carry out FFT conversion for time record with limited length when
assuming continuous repetition of YT waveform. YT waveform will have the same amplitude in beginning
and ending locations for no interrupation. However, high-frequency transient interruption will be caused in
connector due to different waveform amplitudes for non-integral cycle of YT waveform. Such effect shall be
called as leakage in frequency domain. Therefore, value in forced beginning and ending locations is 0 b
multiplying original waveform by a window function to avoid leakage. Please refer to following form for
application of window function
24
FFT window
Characteristic
The most appropriate measurement content
Rectangle
The best frequency and the poorest
amplitude resolution to be basicall
similar to circumstances without window
Transient or short impulse with basically equivalent
signal level; Sine with equivalent amplitude wit
similar frequency; Wide band random noise of wave
spectrum with slow variation
With excellent frequency resolution and
poor amplitude resolution by comparin
Sine, cycle and narrow band random noise
Hammin
Frequency resolution of Hamming window
is better than that of Hanning window slightly
Transient or s hort impulse with large difference
for signal level
The best amplitude resolution and the
poorest frequency resolutio
Mainly used for single-frequency signal to search
for higher order of harmonic wave

Operating Manual for UTD2000/3000
2
Term expl an atio n:
FFT resolution:
Nyquist frequency:
Reference waveform
It is defined as factor of samplin
and calculation point. FFT resolution increases
when sampling rate decreases for fixed calculatio
Original waveform can not be
reset until using sampling rate of at least 2f for
waveform with the maximum frequency of “f”. It is
also called as Nyquist guideline. “f” refers to Nyquist
frequency and “2f” refers to Nyquist sampling rate
Please refer to waveform stored in nonvolatile
memory (NVM) of digital storage oscillograph or
peripheral U disk with name of RefA and RefB as
follows. Please operate acc ording to followin
steps to call out or close reference waveform
5. Please press REF menu key on the front panel
for 5.7-screen oscillograp
Please press [STORAGE]key and enter into the
second page to select call-out for 7-inc
oscillograph (namely, UTD2000L/2000EX series).
2. Please press [RefA] (RefA reference option) and
select information source then select its position b
rotating multi-purpose knob in upper part of front
panel. 1 10 (or 1 20) can be selected for the
position. Press “call-out” to call out waveform
which is stored inthe position originally after
selecting a certain position such as “1”. Pleas e
plug in U disk if waveform is stored in the U d isk
There are 2 options for magnetic disk as follows
DSO/USB; Please press [F2] key and select USB
(The menu can not be activated until plugging in U
disk.) Called out waveform is displayed on the
screen for waveform called out and stored from U
disk. Please press cancel key (F5) Return to
previous menu after waveform call-out
3. To press [RefB] (RefB reference option) and

information source 2 which participates i
calculation and method is the same to the
secondstep. Please measure and observe related
waveform by UTD2000/3000 series digital storage
oscillograph during actual application. Please
compare current waveform with reference
waveform for analysis. Please press REF key to
display reference waveform menu. Setup is also
shown in following form
Form 2-5 Selection of storage positio
It is allowed to select from 1 to 20 for internal
storage position. Please plug in U disk and press
F2 to select USB magnetic disk for external storage
instrument. Please refer to STORAGE menu for
waveform storage
Operating Manual for UTD2000/3000
2
Function menu
Setup
Descriptio
There are 200 groups of
waveform positions for
storage to USB
(Storage position and quantity
To select internal storage position;
To select external storagepositio
(until plugging inU disk)
Close
To close called out waveform
To call out selected wavefo rm;

Operating Man ual for UT D2000/30 00
2
Setup of horizontal system
Horizontal control knob
Control knob on horizontal surface can be used to
alter horizontal scale (or time base) to trigger
horizontal position (or trigger position) shown i
RAM. Vertical middle point toward horizontal
direction on the screen is time reference point for
waveform. Horizontal scale can be altered for
waveform extension or shrinkage by comparin
with screen center. Horizontal position can also
alter by comparing with position of waveform
trigger point
Horizontal position: To adjust horizontal position of
channel waveform (including mathematical
calculation). Resolution of such control key varies
according to time base
Horizontal scale: To adjust main time base, namely
s/div. Window width can vary with delay scannin
time base by rotating horizontal scale knob whe
opening extension time base. Please refer to
introduction to extension time base for details. (As
shown in the following form), horizontal menu ca
be displayed for horizontal control key menu
Function menu
Setup
Descriptio
To close view window
extensionaccordingtomai
To open extension time base
Hold off
To regulate inhibition period

Mark Description:
Trigger horizontal distance of position b
comparing with middle point of view window
Mark represents position of current waveform
view window in RAM
Mark position of trigger point in RAM
Mark position of trigger point in current
waveform view window
Display horizontal time base (or main time
base), namely, s/div
-T mode:
X-Y mode:
Y axle refers to voltage and X axle
refers to time quantum under this mode
X axle refers to CH1 voltage and Y axle
refers to CH2 voltage under this mode
Slow scanning mode: Instrument will enter into
slow scanning sampling mode when settin
horizontal time base control to 100ms/div or less. It
is suggested to set channel coupling to DC whe
observing low-frequency signal by applying for
slow scanning mode
s-div: Time base control can expand or compress
waveform for horizontal scale (or time base) unit if
stopping waveform sampling (by using RUN/STOP
Operatin g Manual for UTD2000/3000
2
Figure 2-11 Interface of horizontal system

Operating Manual for UTD2000/3000
2
View window extension
View window extension is to argument a section of
waveform to review image details conveniently
Setup of view window extension can not be slower
than that of main time base
s shown in above figure), it can be divided into
display areas under extension time base. Original
waveform is displaye d for upper part. Sel ected ar ea
can move horizontally by rotating horizontal
POSITION knob or increase or decrease by rotating
(
Waveform with horizontal extension in originall
selected waveform area is shown in lower part. (As
shown in above figure,) please pay attention that
resolution increases for extension time base b
comparing with main time base. Waveform displayed
by the entire lower party corresponds to area
selected for upper part so users can rotate horizontal
SCALE knob to reduce selected area and increase
extension time base, namely, horizontal extensio
ThemodemustbeusedforCH1andCH2atthe
same time
CH1 voltage will be displayed on X axle and CH
time base
Horizontal extensio
of the waveform
Horizontally extended part of the waveform
Figure 2 1 Screen display under view window
extensio

Operatin g Manual for UTD2000/3000
will be displayed on Y axle after selecting X-
Note: Digital storage oscillograph can capture
waveform by any sampling speed under normal X-
mode. Similarly, it is allowed to adjust samplin
rate, vertical gear of channels and time base gear
under X-Y mode. Default sampling rate is 100MS/s
under X-Y mode. In general, sampling rate ca
reduce to gain excellent Lissajou’s figure. Followin
functions do not effect during X-Y display
Cursor measurement mode
Reference or mathematical calculation waveform
View window extension functio
rol
Ƶ
Ƶ
Ƶ
Ƶ
Ƶ
30
Figure 2 Waveform display under X-Y mode㧙1

Operatin g Manual for UTD2000/3000
3
Setup of trigger system
Trigger can determine data acquisition time and
waveform display for digital storage oscillograph. It
can convert instable display to meaningful
waveform once correct setup. Digital storage
oscillograph will collect sufficient data to map
waveform in the left side of trigger point firstly. It
will acquire data continuously and synchronousl
when waiting for trigger conditions. It also will
acquire sufficient data continuously to map
waveform in the right side of trigger point. Trigger
control area of operation panel of digital storage
oscillograph includes trigger level adjustment knob
and trigger menu key of [TRIG MENU]
5.7-inch oscillograph will set 50% of trigger level i
vertical middle point of signal (and realize
UTD2000L /2000EX by press [SET TO ZERO] key)
It has to press forced trigger key of [FORCE]
Trigger level: Trigger level will set signal voltage
which corresponds to trigger point
50%: To set trigger level to vertical point of trigger
signal amplitude
FORCE: To produc e 1 trigger signal forcefully for
mainly application for normal and single modes
shown in trigger modes
TRIG MENU: To trigger and set menu key

Operating Manual for UTD2000/3000
3
Trigger control
Trigger mode: Edge, pulse width, video and ALT TRIG
Edge trigger: Trigger when edge of trigger signal reaches a certain given level
Pulse width trigger: Trigger when pulse width of trigger signal reaches certain set trigger conditions
Video trigger: Carry out field or line trigger for standard video signals. (UTD2025CL/UTD2000EXseriesis
no such function.
LT TRIG: It is appropriate to trigger signal without frequency relevance. Various kinds of trigger menus
are also shown as follows
Edge trigger mode is to trigger threshold value of input signal edge. That is, to trigger in ascending
descending edge of input signal when selecting “edge trigger”

Operating Manual for UTD2000/3000
3
Function menu
Setup
Descriptio
Type
Edge
Selection of
information source
CH1
CH
Set CH1 as trigger signal of info r ma ti on s ou rce
et CH2 as trigger signal of inf or m atio n sou r ce
Set EXT TRIG INPUT channel as trigge r sig na l of information sourc e
Divide outer trigge r so ur c e by 5 to ex pa nd outer trigger level sco pe
Set municipal powe r tri gg er
LT TR IG of CH1 an d CH2 si gn als ;
scend/descend
Set ascending edge trigger for signal
Set descending edge trigger for signal
Set ascending/descending edge trigger of signal
utomatic
Normal
Single
Set waveform acquisition without detecting trigger conditions
Set waveform acquisition after meeting trigger conditions
Set sampling of a waveform and shutdown after detecting once
trigger
Obstruct DC component of input signal
Pass through AC & DC components of input signal
Inhibit high-frequency components of more than 80kHz for signal
Inhibit low-frequency components of less than 80kHz for signal

Operating Manual for UTD2000/3000
Pulse width trigge
Trigger time s hall be determined for pulse width trigger according to pulse width. You can capture
abnormal pulse by setting pulse width conditions
34
Function menu
Setup
Descriptio
To set CH1 as trigger signal of information source
To set CH2 as trigger signal of information source
To set EXT TRIG INPUT channel as trigger signal of information source.
To divide outer trigger source by 5 to expand outer trigger level scope.
To set municipal power for tri gger
LT TRIG of CH1 and CH2 signals
Pulse widt
To trigger when pulse width exceeds set value
To trigger when pulse width is less than set value
To trigger when pulse width is equivale
Pulse widt
To set pulse wi dth of 2 0ns to 1 0s then regulate by multi -purpose knob in
upper part of front panel

Operating Manual for UTD2000/3000
3
Form 2-9 (the second page
Function menu
Setup
Descriptio
Trigger mode
To set positive pulse width as trigger signal
To set negative pulse width as trigger signal
utomatic
Normal
Single
The system will acquire waveform data automaticall
and display scanning base line on the screen without
trigger signal input. It will convert to trigger scannin
automatically when producing trigger signal
To produce trigger scanning if any trigger signal is produced
To produce once trigger then stop during trigger signal input
High-frequency inhibitionTo pass through AC & D
components of trigger signal
To obstruct DC components of trigger signal
To obstruct pass through of high-frequency c omponents of
signal and only low-frequency components can pass through

Operatin g Manual for UTD2000/3000
Video touc
To trigger in field or row with NTSC or PAL standard video signals after selecting video trigger for
UTD2025CL oscillograph shown in 5.7-inch or 7- inch screen. Trigger coupling is pre-set to DC. P lease
refer to following form for trigger menu
Form 2-10 Setup of video trigger
3
Function menu
Setup
Descriptio
Type
Selection of
Pulse widt
information source
CH1
CH
EXT
To set CH1 as trigger signal of information source
To set CH2 as trigger signal of information source
To set EXT TRIG INPUT channel as trigger signal of
information source
To set 5 times of attenuation for outer trigger signal as trigger
signal
LT TRI G of CH1 and CH2 signals
EXT/
Video signal to be appropriate to PAL system
Video signal to be appropriate to NTSC system
ll rows
Designated row
Odd f iel
To set synchronous trigger of video row
To set synchronous trigger of designated video row for
adjustment by multifunctional knob in upper part of front panel
To set synchronous trigger for video odd field
To set synchronous trigger for video even field

Operating Man ual for UT D2000/30 00
3
Please refer to Figure 2-14 for screen display whe
selecting standard system of PA L and row
synchronization as synchronization mode. Please
refer to Figure 2-15 for field synchronization of
synchronization mode
Figure 2 14 Video trigger: Row synchronizatio
㧙
Figure 2 15 Video trigger: Field synchronizatio
LT TRIGTrigger signal comes from 2 vertical
channels durin g ALT TRIG. Suc h trigge r mode can be
adopted for synchronous observation of 2 signals
without regard to signal frequency. Please refer to
following figure for trigger alternation waveform
display

Setup of trigger coupling mode
Please enter into trigger setup menu for setup of
trigger coupling mode and gain the most sform
synchronization. Please refer to following form for
menu of trigger coupling mode
Operating Manual for UTD2000/3000
Form 2-11 Trigger alternation menu
Function menu
Setup Descriptio
Type
Edge
Set trigger mode to edge
Trigger source
Set trigger gradient to
ascending edge
utomatic
Set trigger mode as
automatic one
Trigger couplin
modeto AC mode
Figure 2 Observation of 2 signals wit

Operating Manual for UTD2000/3000
3
Function menu
Setup
Descriptio
Type
Trigger source
Gradient
Trigger mode
Coupling
Set pass-throu gh obstr ucti on of DC compone nts
Set pass-through of all components
Obstruct pass-through of high-frequency part of signal. Only lowfrequency components can pass through
Obstruct pass-through of low-frequency part of signal. Only highfrequency components can pass through

Adjustme nt of hold off time
djustment of hold off time can be used to observe complex waveform (such as pulse s tring series)
Inhibition time refers to waiting period of digital storage oscillograph to start up trigger circuit again
Digital storage oscillograph will not trigger until inhibition time ends during inhibition period. For instance
as shown in Figure 2-17, the first pulse among a group of pulse series shall be triggered to set inhibition
time to width of pulse string
Please refer to following form for hold off menu
Operating Manual for UTD2000/3000
40
Function menu
Setup
Description
Main time base
1. To open main time base
2. To close view window extension according to main t ime base after openin
To open extension time base
Hold off
To adjust inhibition time

Operating Manual for UTD2000/3000
4
Figure 2—17 Hold off used for synchronization
of complex waveform
Operation Description
1. To select edge, trigger source and gradient show
in TRIG MENU according to synchronization mode of
normal signal then adjust trigger level for stable
waveform display as practicable as possible
2. To press HORI MENU key to display horizontal
menu
3. To adjust multi-purpose knob in upper part of
panel to alter inhibition time for stable waveform
display as practicable as possible
1. Trigger source: To gain trigger from many kinds of
information sources, namely, input channel (CH1
CH2), external trigger (EXT & EXT/5) and municipal
Input channel The most common trigger
information source is optional input channel
Selected one is used as channel of trigger
information source for normal operation regardless
External trigger: Such trigger information source
can be used for trigger on the third informatio
channel during synchronous data acquisition o
channels For instance signals f rom external clock
ure can be used as trigger information source
EXT and EXT/5 trigger sources shall use external
trigger signals
Ƶ
Ƶ

connected to EXT TRIG interface. Signal can be
used for EXT and EXT can be used within signal
trigger level scope of -3V to +3V
utomatic trigger: The system will acquire
waveform data automatically so as to displa
scanning base line on the screen without trigger
signal input. It will convert to trigger scannin
automatically for signal synchronization whe
It is allowed to select EXT/5 for oscillograph of 5.7inch screen. Outer tri gger shall be divided by 5 so
that trigger scope can expand to -15V to +15V for
trigger of digital storage oscillograph under large
signal
Municipal power: Such trigger mode can be used
to observe signal with regard to municipal power
For instance, it can provide relationship betwee
lighting equipment and power supply equipment so
as to gain stable synchronization
2 Trigger mode: It is to determine behavior mode
of digital storage oscillograph without trigger event
This digital storage oscillograph can also provide
triggers, namely, automatic, normal and single
trigger modes
Ƶ
Ƶ
Operating Manual for UTD2000/3000
4
Note: Without trigger signal is allowed under
automatic” mode when setting scanning waveform to
5-ms/div or less time base
Normal trigger: Digital storage oscillograph ca
not acquire waveform until meeting trigger conditions
under ordinary trigger mode. Trigger scanning can be
produced when producing trigger signal
Single trigger: User can press “operation” button
once under single trigger mode for entry and trigger
waiting for digital storage oscillograph. It will sample
and display all acquired waveform then stop after
digital storage oscillograph detects once trigger

Operatin g Manual for UTD2000/3000
4
4. Pre-trigger/delay trigger: To trigger data acquired
in ahead/after event. Trigger position is often set i
the horizontal center on the screen. You ca
observe pre-trigger and delay information of 5di
(or 6div). You can also rotate horizontal position to
regulate horizontal displacement of waveform and
review more pre-trigger details. You can observe
waveform in ahead of trigger by observing pretrigger data. For instance, burring reason can be
shown by observation and analysis on pre-trigger
data after capturing burring during circuit startup
Trigger coupling: Trigger coupling can determ ine
category of signal component conveyed to trigger
circuit. Coupling types include DC, AC, lowfrequency inhibition and high-frequency inhibition
Pass through all components of signals under
DC mode
Ƶ
Ƶ
Ƶ
Ƶ
Obstruct DC components with signal attenuatio
to be less than 400Hz under AC mode
Obstruct DC components with attenuation of
low-frequency component of less than 80kHz under
“low-frequency inhibition” mode
ttenuate high-frequency components of more
than 80kHz under “high-frequency inhibition” mode

Operating Manual for UTD2000/3000
Setup of sampling system
As shown in following figure, ACQ UIRE in
control area is function key of sampling
system
Figure 2 18 Function key of sampling system
User can use ACQUIRE key to pop out samplin
setup menu so as to adjust sampling mode b
control button shown in the menu

Operating Manual for UTD2000/3000
4
Function menu
Setup
Descriptio
ctivate ordinary sampling mode
ctivate peak-value detection mode
Set average sampling mode and display average times
Set average times for step by multiples of 2, namely, 2, 4, 8, 16
32, 64, 128 and 256. As shown in Figure 2-18, average times ca
alter by pressing left multi-purpose knob
Sampling mode
Real-time
Equivalent
Set sampling mode to real-time sampling mode
Set sampling mode to equivalent sampling mode
cquire by higher screen refreshing rate to reflect dynamic
effect of waveform excell ently

It has to observe waveform display variation b
altering obtainment mode. Please refer to Figure 219 and 2-20 for sampled waveform display if signal
contains large noise when adopting 32 times of
average mode or without adopting average mode
Operating Manual for UTD2000/3000
4
Figure 2-20 Waveform by adopting 32 times of average mode
Figure 2 Waveform without adoptin
Please select real-time sampling mode for observation
2. Please select equivalent sampling mode for observatio
of high-frequency periodic signal
3. Please select peak-value detection mode to avoid mixed
signal envelope. Please select average sampling mode wit
step of multiples of 2 for average value to reduce random
noise of displayed signal. Average times can be selected

Real-time sampling: It refers to data required for once acquisition
Equivalent sampling: It refers to repeated sampling mode. It can facilitate careful observation of repeated
periodic signals. It can be adopted to gain horizontal resolution which is higher than real-time sampling
resolution greatly
Sampling mode: It can be classified into equivalent and real-time modes
Peak-value detection mode
Digital storage oscillograph will find out the maximum and minimum input signals within ev ery sampling
interval for waveform display by using such values under such obtainment mode. It can also obtain and
display narrow impulse or they may be omitted for larger noise under such mode. Average mode is as
follows: Digital storage oscillograph may obtain several waveform and calculate average value then
display final waveform under this obtainment mode. Such mode can be adopted to reduce random noise
Operating Manual for UTD2000/3000
4

Operating Manual for UTD2000/3000
Setup of display system
s shown in following figure, DISPLAY in control area is function k ey of display sy stem
Figure 2 Function key of sampl ing system
Please press DISPLAY button to pop out setup menu shown in following figure. Display mode can be
adjusted by pressing menu control button

Operatin g Manual for UTD2000/3000
4
Display type: To fill in blank between adjacent sampling points during vector display. Only sampling points
will be displayed for point display
Function menu Setup
Description
Display type
Vector point
Only to display sampling points by wiring
Operation mode of digital storage oscillograp
X-Y display mode; X input for CH1 and Y input for CH2
Continuous
Close
1s
2s
5s
Infinite
Real-time updating of screen waveform
To update after keeping waveform data shown in the screen for 1s
To update after keeping waveform data shown in the screen for 2s
To update after keeping waveform data shown in the screen for 5s
To always keep display of original waveform data shown in the screen
until this function is inactivated if new data is added into displa
Waveform brightness
1% - 100%
To set waveform brightness (without this function for
UTD2000C/3000C

s shown in following figure, STORAGE in MENU
control area is f unction k ey of storage system
Operation steps
Please press STORAGE Enter into type menus
There are 3 types, namely, waveform, setup and
bitmap
Please refer to Figure 2-16 for selection of type
waveform and entry into following waveform
storage menu. Please call out REF (reference
waveform shown in the second page) from Section
2 of the chapter after saving waveform
Form 2-16 Waveform storage menu (the first page)
Operating Manual for UTD2000/3000
50
Figure 2 22 Function key (storage) for sampling system
STORAGE key can be used to display storage setup menu. You
can save oscillograph waveform or setup status to internal
storage area or U disk to call out saved waveform by Ref
(or RefB) or call out setup status by STORAGE key. Waveform
display area of oscillograph can be saved to DSO contents in U
disk in a form of bitmap. Saved bitmap can be read by PC computer

Operatin g Manual for UTD2000/3000
5
Form 2-16
Function menu
Setup
Descriptio
Type
Wav e form
Select waveform storage and callout menu
Information source
CH1
CH
Select waveform from CH1 channel
Select waveform from CH2 channel
a refer to positions to store 20 groups of waveform
There are 200 groups of waveform positions for storage to USB
(Storage position and quantity vary with machine model.
Save
Save wavef orm
Next page
1/
Figure 2-23 Waveform storage
Figure 2-24 Waveform storage by U disk
üü
üü

Operatin g Manual for UTD2000/3000
Form 2-17 Storage menu (the second page
Function menu
Setup
Descriptio
Magnetic disk
DSO
USB
To select internal RAM of digital storage oscillograph the
select external U disk. (This function can not be used until
plugging in U disk.
Long storage
To set storage depth to ordinary; (Callout only can be done i
REF area when saving data to U disk.
To set storage depth to long storage. (Note: This function ca
not be activated until plugging in U disk. Callout can not be
done until using loading function of computer communicatio
software or waveform analysis load when saving data to U disk.

s shown in Form 2-18, please select setup and enter into setup storage menu
Figure 2-25 Storage setup
Form 2-18 Setup of storage menu
5
Operating Manual for UTD2000/3000
Function menu
Setu
Description
Setup
To select panel setup menu
Setup of (storage position
Operation setup to save 20 groups of panels: To select by multi
purpose knob in upper part of front panel. (Position and quantit
vary with machine model
Save
Storage setup
Recall
Callout setup

s shown in Form 2-19, please select bitmap for entry into bitmap storage menu
Remark: This function can not be called out until plugging in U disk
Form 2-19 Bitmap storage menu
Operating Manual for UTD2000/3000
Function menu
Setup
Descriptio
Bitmap
Select bitmap menu
Storage positio
200 bitmap data can be saved by selecting multi-purpose knob in
upper part of front panel. (It is 1 to 10 for UTD2000C series.
Save
Save bitmap data
üü
üü
Figure 2-26 Bitmap storage

Setup of auxiliary functions
s shown in following figure, UTILITY in MENU
control area is function key
Figure 2 27 Function key (and function) of
samplin
User can press UTILITY key to pop out setup menu
of auxiliary system function
Form 2-20 (the first page
Operating Man ual for UT D2000/30 00
Function menu
Setup
Descriptio
Cancel
To carry out self-correction
To cancel self-correction and
return to previous page
To set waveform Pass/Fail
UTD2025C/3025C and
UTD2025CL have this
function.
Language Multilanguage
Select interface language

Operating Manual for UTD2000/3000
Form 2-21-1 (the second page
Function menu
Function menu
Setup
Setup
Descriptio
ctivate/inactivate fast correction function of channels within scope
of 2mV/div to 10 mV/div. (Only UTD2025C/3025C has this function.
Interface style
The first style
The secondstyle
The third style
Thefourthstyle
Set 4 interface styles for digital storage oscillograph
Gridding brightness
1% - 100%
djust gridding brightness of the screen by multi-purpose knob
UTD2000C/3000C also has no this function
Form 2-21-2 (the third page
Display information of current oscillograph system
ctivate/inactivate function of frequency meter

Form 2-22 Waveform recording menu
5
Operatin g Manual for UTD2000/3000
Function menu
Setup Descriptio
Information source
CH1
CH
Select CH1 as recording signal source
Select CH2 as recording signal source
Select ct CH1+CH2 as recording signal source
Record by pressing recording key for synchronous display of
recorded quantity in lower part of the screen
2. Press the key f or playback and display of current playback
screen No. in lower right corner of screen. Playback can be
stopped by rotating multi-purpose knob controller in upper part
of panel. However, waveform of a certain screen can be selected
for repeated playback by continuing to rotate it
3Press to stop then press for playback of all items
Save newly recorded waveform for U disk plug-in. Storage
position can be selected by multi-purpose knob
Call out recorded wavef orm from U disk then sele ct recor din
position by multi- purp ose kno b
Return to previous level of menu

Operating Manual for UTD2000/3000
Form 2-23 By detectio
Function menu
Setup
Descriptio
Close
Open/close information of waveform pass/fail times
Information source
CH1
CH
RefB
Select CH1 as detected signal source
Select CH2 as detected signal source
Select MATH as detected signal source
Select RefA as detected signal source
Select RefB as detected signal source
Output conditions
Pass
Pass/Halt
Fail/Halt
Fail
Output concurrency prompt when detecting waveform pass
Output and pause when detecting waveform pass
Output and pause when detecting waveform fail
Output concurrency when detecting waveform fail
Tem p la te set up
Refer to Form
2-24 for details
Enter into template setup menu

Self-correction: Self-correction procedure is to
correct measurement error caused by digital
storage oscillograph due to ambient variation. You
can operate the procedure according to demand
Please open power of digital storage oscillograp
then wait for instrument pre-heating for 30 minutes
for more correct calibration. Please press UTILIT
key (as an auxiliary function) for operatio
according to prompt shown in the screen
Language selection: There are many kinds of
languages for UTD2000/3000 series digital storage
oscillograph. Please press UTILITY me
and select appropriate language
Operatin g Manual for UTD2000/3000
Form 2-24 Template s etup
Function menu
Setup
Descriptio
Template output
Set horizontal and vertical
Pass/Fail tolerance scope
accordingtoadjustment
Horizontal 1-200Pixel
Set horizontal tolerance
scope
Vertical
1-100Pixel
Setvertical tolerance scope
Retur

s shown in following figure, MEASURE is
automatic measurement function key. You can be
familiar with powerful automatic measurement
function of UTD2000/3000 series digital storage
oscillograph gradually by following introduction
Application example
Measurement menu of such series of oscillograp
can be used to measure 28 kinds of waveform
parameters. User can press MEASURE key Enter
into parameter measurement display menu firstly.
The menu includes 5 areas to display measurement
value at the same time. They correspond to functio
keys of F1 to F5 res pectively. Please press
corresponding F keys Enter into measurement
category selection menu if measurement category
shall be selected for any area. Measurement
category selection menu can be classified into
voltage and time kinds Enter into voltage or time
measurement category respectively. Please press
F1 to F5 to select measurement category the
return to parameter
measurement display menu. In addition,user ca
Operating Manual for UTD2000/3000
Figure 2-28 Function key (automatic measurement

press F5 to select “All parameters” to dis play all
voltage/time measurement parameters. User ca
press F2 to select channel to measure. (Channel is
ineffective until opening.) User can press F1 Retur
to parameter measurement display menu if not
altering current measurement category. The first
example: Steps are as follows if displayin
measured peak value of CH2 channel in F1 area
1. To press F1 key Enter into measurement
category selection menu
2. To press F2 to select CH2
3. To press F3 to select voltage
4. To press F5 (shown in the second page, 2/4) to
see that F3 position is “peak value
5. To press F3 to select “peak value” and return to
parameter measurement display menu
automatically
Peak value is display ed in F1 area on the
homepage of measurement menu
The secondexample: Setup of delay measurement:
Delay measurement function is used for interval
between ascending edges of 2 information sources
namely, interval from ascending edge of the first
cycle of a certain information source to that of the
first cycle of additional information source
Measurement steps are as follows
1. To refer to above example and select area
displayed by delay measurement value after
entering into measurement menu (shown in 3/
2. To select reference information source of CH1
then select delay information source of CH2
3. To select reference information source of
then select delay information source of CH2
4. To press F5 to confirm that delay measurement is
displayed in selected area
Operatin g Manual for UTD2000/3000

Automatic measurement of voltage parameters
Voltage parameters which can be measured b
UTD2000/3000 series oscillograph automaticall
Peak value (Vpp): Voltage from the highest
waveform point to the lowest waveform point
The maximum value (Vmax): Voltage from the
highest waveform point to GND (ground)
The minimum value (Vmi n): Voltage from the lowest
waveform point to GND (ground)
Middle value (Vmid): Half of sum of waveform top
and bottom voltage
mplitude (Vamp): Voltage from waveform top to
bottom
Middle value (Vmid): Half of sum of waveform top
and bottom voltage
Top value (Vtop): Voltage from flat waveform top t
Bottom value (Vbase): Voltage from waveform
Overshoot: Ratio of difference of the maximum
waveform value and top value and amplitude
Preshoot: Ratio of difference of the minimum
waveform value and bottom value and amplitude;
verage value: Average amplitude of signals withi
Root-mean-square (Vrms): It is effective value
Root-mean-square refers to DC voltage of
converted energy within 1 cycle according to A
signal to correspond to equivalent energy
Operating Manual for UTD2000/3000
6

Automatic measurement of time parameters
UTD2000/3000 series oscillograph can measure
signal frequency, cycle, ascending time
descending time, positive pulse width, negative
pulse width, delay (of 9 combinations), positive dut
cycle, negative duty cycl e and 10 time parameters
automatically. Definitions of such time parameters
are as follows
RiseTime: It refers to period when waveform
amplitude increases from 10% to 90%
FallTime: It refers to period when waveform
amplitude decreases from 90% to 10%
Positive pulse width (+Wi dth): It refers to pulse
width of positive pulse under 50% of amplitude
Negative pulse width(-Width): It refers to pulse
width of negative pulse under 50% of amplitude
Delay (ascending edge): It refers to delay from
ascending edge to ascending edge
Delay (descending edge): It refers to delay from
descending edge to descending edge
Positive duty cycle (+Duty): It refers to ratio of
positive pulse width and cycle
Negative duty cycle (-Duty): It refers to ratio of
negative pulse width and cycle
Operation Description: Please press MEASURE
key so that the screen can display 5 measurement
values. As shown in Form 2-25, user can press any
key of F1 to F5 so that the screen enters into
Measurement menu
Operatin g Manual for UTD2000/3000
6

Operating Manual for UTD2000/3000
64
Form 2-2
Function menu
Setup
Descriptio
Return to parameter measurement display menu
Information source
CH1
Select channel of measurement parameters
Select channel of measurement parameters
Enter into voltage parameter menu
Enter into time parameter menu
ll parameters
Display/close all measurement parameters
Function/measurement item
Descriptio
Return to menu shown in Form 2-25
Preshoot
Return to parameter measurement display menu and
substitute original position parameter after selection
mplitude
he same as above
Overshoot
The same as above
Next page (1/4
Of which: Menu included by “voltage kind” is shown i n Form 2-26 to 2-29

Form 2-27
Function/measurement item
Function/measurement item
Descriptio
Operating Man ual for UT D2000/30 00
Previous page
Return to previous page
verage value
Return to parameter measurement display menu and substitute
original position parameter after selection
Peak value
he same as above
he same as above
Root-mean-square
Next page (2/4
Previous page
Top value
Return to previous page
Return to parameter measurement display menu and substitute
original position parameter after selection
Bottom value
The same as above
The same as above
Middle value
Next page (3/4

Operatin g Manual for UTD2000/3000
Function/measurement item
Function/measurement item
Descriptio
Return to menu shown in Form 2-25
The maxim um value
Frequenc
Return to parameter measurement display menu and substitute
original position parameter after selection
Return to parameter measurement display menu and substitute
original position parameter after selection
The minimum value
Cycle
The same as above
The same as above
Next page (4/4
Return to the first page (shown in Form 2-26
üü üü
Menu included by “time category” is shown in Form 2-30 to Form 2-32
The same as above
RiseTime

Operatin g Manual for UTD2000/3000
Function/measurement item
Function/measurement item
Descriptio
Previous page
Previous page
Return to previous page
Return to parameter measurement display menu and substitute
original position parameter after selection
Enter into delay option menu (shown in Form 2-32a) after
selection
Cycle
Positive duty cycle
The same as above
Return to parameter measurement display menu and substitute
original position parameter after selection
Return to the first page (shown in Form 2-30)
The same as above
The same as above
RiseTime
Negative duty cycle

Cursor measurement
User can press CURSOR button to displa
measurement cursor and cursor menu then use
multi-purpose knob controller to alter cursor
position. As shown i n following figure, CURSOR in
MENU control area is cursor measurement functio
Figure 2-29 Function key (or cursor) of samplin
Operating Manual for UTD2000/3000
Return to parameter
measurement display men
and substitute original
position parameter after
selection

User can move cursor for measurement under
CURSOR mode. There are 3 modes, namely, voltage
time and tracing. V can be measured by pressin
SELECT and COARSE keys on the panel and multipurpose knob controller to adjust positions of
cursors respectively during voltage measurement
Similarly, it can b e measured if selecting time. Cursor
of digital storage oscillograph can also trace signal
variation automatically under tracing mode wit
Remark: For 5.7-inch oscillograp
1. Effect of SELECT key is to select the cursor
2. Effect of COARSE key is to adjust movement speed
of cursor
User can press multi-function knob key to select the
cursor. Movement speed of cursor can also alter
according to rotation speed
1. Voltage/time measurement mode: The first or
secondcursor will appear at the same time. Cursor
position on the screen can be adjusted by multipurpose knob controller. User can press SELECT ke
(or multi-function knob key) to select cursor to adjust
Displayed reading is also time or voltage between
2. Tracing mode:Horizontal and vertical cursors ca
intersect to become a crossing cursor. Crossin
cursor can position on the waveform automatically to
adjust horizontal position of crossing cursor on the
waveform by rotating multi-purpose knob controller
Digital storage oscillograph can also displa
coordinate of cursor point at the same time
3. Measurement value will be displayed in upper
right corner of the screen automatically whe
Operating Manual for UTD2000/3000
6

RUN/STOP key is in upper right corner of front
panel of digital storage oscillograph. User ca
press the key so that green lamp is on to show
operation status. Red lamp can be on after pressin
the key to show stop status
Figure 2-30 Operation/stop ke
s shown in above figure, automatic setup is to
simplify operation. Digital storage oscillograph ca
adjust vertical deflection coefficient and horizontal
time base gear automatically for stable waveform
display on the screen according to waveform
amplitude and frequency when user presses AUTO
key. System setup is shown in following form durin
Automatic setup
Operatin g Manual for UTD2000/3000
70

RUN/STOP: To acquire waveform or stop
acquisition continuously;
The key can be pressed for switchover of waveform
sampling between operation and stop. User ca
press the key under operation status so that green
lamp is on. “Auto” can be displayed in upper part of
the screen. Old digital storage oscillograph ca
acquire waveform continuously while red lamp is o
by pressing the key under stop status. Digital
storage oscillograph can stop acquisition whe
displaying “Stop” in upper part of the screen
Operatin g Manual for UTD2000/3000
7
Setup
Obtainment mode Samplin
Display format
Set to YT
Horizontal positio
djustment according to signal
frequenc
Hold off
The minimum value
Trigger level
Set to 50%
utomatic
Trigger mode
Trigger source
Set to CH1; Set to C H2 whe
exerting on signal for it if there
is no signal for CH1
djustment according to signal
amplitude

Operating Manual for UTD2000/3000
7
Chapter 3: Applicatio n Example
The first example: Measurement of simple signal
It has to observe a unknown signal in the circuit for
quick display and measurement of signal frequenc
2
1. Please operate according to following steps for
quick signal display
1. Please operate according to following steps for
quick signal display
To set probe menu attenuation coefficient to 10*
and set switch on the probe to 10*
To connect CH1 probe to measured point of
circuit
Digital storage oscillograph can set automaticall
for the best waveform display.You can al so adjust
vertical or horizontal gear on above basis so that
waveform display can meet related requirements
utomatic measurement of signal voltage and
time parameters
Digital storage oscillogra
ph can measure most of
display signals automatically. Please operate
according to following steps for measurement of
signal frequency and peak value
To press MEASURE key to display automatic
measurement menu
To press F1 to enter into measurement menu
category for selectio
To press F3 to select voltage categor
To press F5 to turn to 2/4 page then press F3 to
select measurement type of peak value
To press F2 to enter into measurement menu
category for selection then press F to select
time categor
ķ
ķ
ĸ
Ĺ
ĺ
Ļ
ྚ
ྛ
To press F2 to select measurement type of

Operating Manual for UTD2000/3000
7
The secondexample: Delay observation of sine
wave signal by circuit
The same as above example, please set
attenuation coefficient of probe and digital storage
oscillograph to 10*. Please connect CH1 channel
of digital storage oscillograph to circuit signal input
terminal and connect CH2 channel to output
terminal
1. Signal display of CH1 and CH2 channels
To continue to adjust horizontal or vertical gear
so that waveform display can meet your test
requirements
To press CH1 key to select CH1 then rotate
vertical position knob to adjust vertical positio
of CH waveform
To press CH2 key to select CH2 then adjust
vertical position of CH2 waveform to facilitate
ķ
ĸ
Ĺ
ĺ
Figure 3-1 Automatic measurement

Operating Manual for UTD2000/3000
74
comparison without waveform overlapping for the
first and second channels
2. To measure delay of sine signal caused b
circuit then observe waveform variation.
ķĸDelay of automatic measurement channel
To press MEASURE button to display automatic
measurement menu
To press F1 key to enter into measurement menu
category for selection
To press F4 key to enter into time measurement
parameter list
To press F5 key twice to enter into 3/3 page
To press F2 key to select delay measurement
To press F1 key to select CH1 then press F2 key to
select CH2 then press F5 as enter ke
You can see delay value from “CH1-CH2 delay” i
Observation of waveform variation (shown i
Figure 3-2: Waveform dela

Operating Manual for UTD2000/3000
7
The third example: Capture of single signal
dvantages and characteristics of digital storage
oscillograph include convenient capture of
aperiodic signals such as pulse and burring, etc. It
has to know this signal to set trigger level and
trigger edge to capture a signal signal. For
instance: Trigger level shall be set to about 2V and
set trigger edge to ascending edge trigger if pulse is
a logic signal of TTL level. User can observe it b
automatic or ordinary trigger mode so as to
determine trigger level and trigger edge for
unknown signals
Operation steps are as follows
1. To set attenuation coefficient of probe and CH1
channel like the previous example
To press MENU button in trigger control area to
display trigger setup men
To set trigger type to edge, trigger source to CH1
gradient to ascend, trigger mode of single mode and
trigger coupling to AC by using menu operation keys
of F1 to F5 respectively under this menu
To adjust horizontal time base and vertical gear to
appropriate scope
To rotate TRIGGER LEVEL knob to adjust
appropriate trigger level
To press RUN/STOP execution button to wait for
signals which meet trigger conditions. Once
sampling can be done for display on the screen if a
gnal reaches set trigger level. Occidental
events can be captured easily by utilizing t he
function. For instance: Sudden burring with large
amplitude Please set trigger level to be higher
than normal signal slightly then press
RUN STOP button for waiting The machine will
trigger automatically and record waveform before
and after trigger during burring. Horizontal
POSITION knob in horizontal
ķ
ĸ
Ĺ
ĺ
Ļ

Operating Manual for UTD2000/3000
7
control area on the panel can be rotated to alter
horizontal trigger position so as to gain negative
delay trigger with different length to facilitate
observation of waveform before burring
You can adjust setup of digital storage oscillograph
for overlapping of random noise to tested signal so
as to filter or reduce noise and avoid disturbance to
ontology signal during measurement. (Please refer
to following figure for waveform.
Figure 3-4 To reduce random noise of signals
Operation steps are as follows
1. As shown in previous example, please set
attenuation coefficient of probe and CH1 channel
The fourth example: To reduce random noise of
the si gnal

2. To connect signals for stable waveform display o
digital storage oscillograph
Please refer to previous example for operation
Please refer to previous chapter for adjustment of
horizontal time base and vertical gear
3. To improve trigger by setting trigger coupling
(1) To press MENU button in trigger area to displa
(2) To set trigger coupling to low-frequenc
inhibition or high-frequency inhibition. Lowfrequency inhibition is to set a high-pass filter to
filter low-frequency signal component of less tha
80kHz and allow pass through of high-frequenc
signal component. High- frequency inhibition is to
set a low-pass filter to filter high-frequency signal
component of more than 80kHz and allow pass
through of low-frequency signal component. It ca
be set to inhibit low-frequency or high-frequenc
noise respectively to gain stable trigger
4. To reduce display noise by setting samplin
To adopt average sampling mode to eliminate
display of random noise to thinner waveform and
facilitate observation & measurement if waveform is
thickened by overlapping random noise to
measured signal. Signal details can be observed
y by reduced random noise after gainin
average value. Detailed operation is as follows
To press ACQUIRE button in panel menu area to
display sampling setup menu To press F1 key as
menu operation key to set obtainment mode to
average status. (As shown in following figure,
please adjust average times by pressing F2 key as
menu operation key with step from 2 to 256 b
multiples of 2 so that waveform display can meet
observation & test equirements
ķ
Operating Manual for UTD2000/3000

Figure 3-5 Inhibited signal noise
To reduce display noise by reducing wav eform
brightness
Note: Average sampling mode can be used to slow
down updating speed for waveform display as
normal phenomenon
This digital storage oscillograph can measure 2
kinds of waveform parameters automatically. All
automatic measurement parameters can be measured
by cursor. Waveform time and voltage can be
measured quickly by using cursor
Please operate according to following steps to
measure 1 staircase voltage of staircase signal
1. To press CURSOR key to display cursor
measurement menu
2. To press F1 key as menu operation key to set
cursor type to voltage
3. To rotate multi-purpose knob controller to place the
first cursor to 1 staircase of staircase signal
4. To press SELECT or PUSHSELECT to select the
cursor then rotate multi-purpose knob controller to
place the secondcursor to another staircase of
staircase signal
ĸ
The fifth example: Application curso
measurement
To measure 1 staircase voltage of staircase signal
Operating Manual for UTD2000/3000

Ƹ
V namely pressure difference can be show
in cursor menu automaticall
Please refer to following figure for details
Note: Please set cursor type to time if onlyin
adopting the secondstep as above for time
measurement by cursor
Figure 3-6 Voltage difference of signal by cursor
measurement
To review phase location difference of signals of
Example: Phase location variation caused by 1
circuit for tested signals. Please connect digital
storage oscillograph to cir cuit to monitor
input/output signal of circuits. Please operate
according to following steps to review input/output
terminal of circuits by way of X-Y coordinate
diagram
1. To set probe menu attenuation coefficient to 10*
and set switch on the probe to 10*
2. To connect CH1 probe to network input the
connect Ch2 probe to network output
3. To press CH1 and CH2 menu keys and open
channels if they have not been displayed
5. To adjust vertical scale knob for approximate
equivalent display amplitude of 2 loops of signals
The sixth example: Application of X-Y function
Operating Man ual for UT D2000/30 00

80
6. To press DISPLAY menu key to call out displa
7. To press F2 to select X-Y. Digital storage
oscillograph will display input/output characteristics of
circuit under Lissa Jous's figure mode
8. To adjust vertical scale and vertical position knob to
reach the best effect for waveform
9. (As shown in following figure), please observe and
calculate phase location difference by elliptic
oscillograph figure method
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location difference angle between channels. Please
refer to above figure for definition of A, B, C and D.
Therefore,phase location difference angle is
calculated as follows =±arcsin A B or
±arcsin C D Calculated phase locatio
difference angle shall be within Q uadrant I or IV
(namely, (0~ ) or ( ~ ) if main axle of ellipse
is within Quadrant I or III. Calculated value is within
( ~ ) or ( ~ ) if main axle of ellipse is withi
Quadrant II or IV. Additionally, frequency and phase
location relationship between 2 signals can be
calculated according to figure if frequency or phase
location difference of 2 measured signals is integral
multiple
Operating Manual for UTD2000/3000
Signal must be in the
horizontal center
Figure 3-

10.Form of X Y phase location difference The seventh example: Trigger of video signal
Trigger o f video fiel
Video trigger function can be used for all modes
except UTD2000L/2000EX series. (Of which
UTD2025CL has video trigger function.
It has to adopt video trigger to gain stable video
output signal display for observation of a certai
Please operate according to following steps for
trigger in video field
1. To press[ MENU ]button in trigger control area to
2. To press[ F1] key as menu operation key to select
video type
3. To press[ F2] key as menu operation key to set
trigger source to CH1
4. To press[ F3] key as menu operation key to select
video standard of P
Operating Manual for UTD2000/3000
Frequenc
ratio of
signal
1:1
Phase location difference
0°
4

Operating Manual for UTD2000/3000
8
5. To press [F4] key as menu operation key to select
synchronization of odd field or even field
6. To adjust horizontal time base by rotatin
horizontal SCALE knob in horizontal control area so
as to gain clear waveform display
Figure 3-8 Trigger of video field
Please operate according to following steps for
trigger in video row
1. To press [MENU] button in trigger control area to
2. To press[ F1] key as menu operation key to select
3. To press [F2] key as menu operation key to set
trigger source to Ch1
4. To press[F3] key as menu operation key to select
video standar
5. To press[ F4] key as menu operation key to select
synchronization to designated row
6. To rotate multi-purpose knob controller for trigger
in any row
7. To adjust horizontal time base by rotatin
horizontal SCALE knob in horizontal control area so
as to gain clear waveform display

Operating Manual for UTD2000/3000
8
Figure 3-9 Trigger of video row
It has to check if input signal is within rule scope or
not. Fail refers to out of scope and Pass refers to
within the scope. Pass/Fail signal can be shown b
1. To press[UTILITY] button then press[F2]Enter into
2. Setup of information source: Enter into Pass/Fail
menu then press[F2] to select information source
3. Template setup: To press[F4] Enter into template
setup menu (Template). To press[F2] and[F3] show
in Template me nu to set horizo ntal and ver tic al
tolerance scope by multi-function knob, (namely, 1200Pixel toward ho
rizontal direction and 1-100Pixel
toward vertical direction.) Please press F4 finall
Return to Pass/Fail menu.
4. Setup of output conditions: To press[F3] to set
output conditions shown in Pass/Fail menu
5. To begin detection: To press[F1] to ope
detection status shown in Pass/Fail menu
The eighth example: Pass/Fail detection
of the rear panel
Rear panel of Pass / Fail output
Pass FailInterface Schematic

Operating Man ual for UT D2000/30 00
84
The ninth example: Usage o f updatin
procedure of U-disk
Updating procedure of U-disk can be used more
conveniently and flexibly. Please operate according to
following step s if using this fun cti on
1. To download procedure documents to update from
Internet then save them in U-disk. (It is suggested to
use U-disk suggested by us.
2. To close oscillograph and insert U-disk then ope
3. To turn to confirmation interface of whether to
update it or not if there is only 1 procedure document
in U-disk. Please press[F5] for exit or press F1 to e xit
procedure updating. Document selection interace will
appear if there are at least 2 procedure documents i
U-disk. Please press[F5] key for confirmation (or
press[F1] to exit procedure updating). Please turn to
confirmation interface of whether to update it or not
then press[F5] for updating)
4. To wait for updating for prompt of successful
updating. Please power off oscillograph then open it to
fulfill updating pr oce dure
1. Please wait for updating for several minutes
2. It is not allowed to power off oscillograph or plug
out U-disk during updating to avoid updating failure
or unforeseenable error
3. Please power off oscillograph then open it for reupdating after updating failure

Operating Manual for UTD2000/3000
8
The tenth example: Usage of storage function
1. Setup of storage function:
Storage functions of oscillograph include setup
storage, waveform storage, bitmap storage and
specific screen copy function of UTD2000L/2000EX
series of oscillograph
It has to select display channel, trigger channel
vertical and horizontal gears of oscillograph for
setup. Please press[STORAGE] key to sel ect
torage type of “setup” by pressing[F1 ]key. As
shown in following figure, it has to select position to
save by multi-function button then press F3 for
saving
It can be tested directly during next test after saving
setup to reduce re-setup process. UTD2000C series
of oscillograph can save 10 kinds of setup while
UTD2000E and UTD2000L/2000EX series of
oscillograph can save 20 kinds of setup
Figure 3-10 Saving setup interface

Operating Manual for UTD2000/3000
8
2. Waveform storage function:
UTD2000 series of oscillograph can provide waveform
storage function. User can press[STORAGE]key and
[F1] key to select storage type of “waveform”. User ca
press [F2]key to select channel to save waveform the
press[F5]Ente r in to ne x t page . M ag ne ti c dis k in F1
menu position can designate storage position and
default storage position is digital storage oscillograp
(DSO) without plugging in U-disk. Stored magnetic disk
position can be [DSO] or [USB] after plugging in U-disk
Default storage depth shown by F2 is ordinary and
saved waveform only can be displayed by oscill ograph
Storage depth can be selected to long storage to save
“.data” for exporta ti on by wa v ef orm ana l ysi s s oft wa r e
when plugging in U-disk and selecting magnetic disk
position to [USB]. It is allowed to analyze content data
of every point of saved waveform. User can also press
F5 Return to previous me nu th en select storage
position by multi-fun c ti on bu tto n the n pre ss [F3] fo r
saving
Figure 3-12 Waveform storage by U-disk
Figure 3-11 Waveform storage

Operating Manual for UTD2000/3000
8
s shown in following figure, saved waveform ca
be recalled by short-cut key of [REF] on the panel
for UTD2000C and UTD2000E series of
oscillograph. User can press [F3] shown in the
second page of STORAGE main menu for recall for
UTD2000L/2000EX series of oscillograph
Figure 3-13 Vertical control panel of 5.7-inch scree
s shown in following figure, user can press[ F1]
menu key of STORAGE main menu to select storage
type of “bitmap” after plugging in U-disk and
successful connection of osc illograph. User ca
rotate multi-function knob to select saved bitmap
No. Saved bitmap in U-disk with “.BMP” format ca
be read out by computer directly
Figure 3-14 Bitmap storage
3. Bitmap storage function:

Operating Man ual for UT D2000/30 00
8
4. Pr tSc copy & storage function
Introduction to S ystem Prompt
There is 1 PrtSc key in upper left corner of the scree
for U TD2000L/2000EX series of oscillograph. User
can press the key for screen copy after plugging in Udisk. Displayed image can be saved in U-disk by wa
Regulation to the extreme: It prompts that multipurpose knob has been regulated to the greatest
extent under current status and continued adjustment
is not allowed. The prompt will display whe
regulating vertical deflection coefficient switch, time
base switch, X displacement, vertical displacement
and trigger level to the terminal
Successful connection of U-disk : The prompt will
display on the screen after connecting U-disk to
digital storage oscillograph and correct connection
Plug-out of U-disk: The prompt will display on the
screen when plugging out U-disk from digital
storage oscillograph.Saving: The prompt will
display on the screen with schedule bar below it
when saving waveform
Chapter 4: System Prompt and
Troubleshootin